Middletown-Norwalk ProjectRoute Analysis and Selection – Segments 1 & 2 Prepared for the Connecticut Siting Council

June 1, 2004

Overview

1. Summarize process used to select a route2. Review transportation corridors

HighwayParkway (including the Crossing of West Rock Tunnel)Railway

3. Review Segment One right of way routes4. Review Segment Two right of way routes

Determining a Route

What is the best combination of solution components?

PROPERTY IMPACTImpact on homes &

property; Visual impact

ENVIRONMENTAL IMPACTImpact on wildlife, vernal pools,

aquifers

SYSTEM BENEFITOperability†, Reliability†

TECHNICAL FEASIBILITYCan it be engineered? Can

it be built?

COST to CUSTOMERSEngineering and

Construction Costs

† Per national and regional reliability standards.

What are the components of the solution?

Overhead Point-to-Point

Options

Underground Point-to-Point

Options

Evaluate each option based on

these criteria

Evaluate each combination based

on these criteria

What needs to be done?*

* Per regional planning led by ISO-New England.

1.Strengthen power source to a point in Wallingford

2. Connect that source to substations in Milford, Bridgeport, and Norwalk

11

2

22

MiddletownMiddletown

NorwalkNorwalk

22

22

22S/SS/S

S/SS/S

S/SS/S

11

11S/SS/S

To meet national and regionalreliability standards…

Step 1: What needs to be done?

Step 2: What are the options?

What is the best combination of solution components?

What are the components of the solution?

Overhead Point-to-Point

Options

Underground Point-to-Point

Options

1

Step 3: What are the best options?

PROPERTY IMPACTImpact on homes &

property; Visual impact

ENVIRONMENTAL IMPACTImpact on wildlife, vernal pools,

aquifers

SYSTEM BENEFITOperability†, Reliability†

TECHNICAL FEASIBILITYCan it be engineered?

Can it be built?

COST to CUSTOMERSEngineering and

construction costs

† Per national and regional reliability standards.

Evaluate each option based on

these criteria

Evaluate each combination based

on these criteria

Choosing a Route was an Iterative Process

m nDecision

Circle

Environmental ReviewPhenix Environmental, Inc.

HistoricalRaber Associates

EnvironmentalTopology

Water ResourcesCoastal Area

CulturalSSES

Marine OptionsESS

EMF/ Best PracticeExponent

CB EllisProperty Impact

Underground Technology Underground Construction

PDCJD Hair

Transmission &Substation DesignBurns & McDonnell

Routing & CriteriaBurns & McDonnell

HVDCBlack & Veatch

Singer Substation SiteBlack & Veatch

NoiseCavanough & Tocci

General ElectricISO-NE

NU

System Studies

Corridors Considered

HighwayCorridors

RailwayCorridors

Transmission Rights of Way

I-91, I-95Wilbur Cross

Amtrak RailroadConrail Railroad

East Devon

ScovillRock

?

Beseck

Transmission ROWSecondary Roads

I-91, I-95

East Devon

ScovillRock

Oxbow Junction

7.4 miles

10.2 miles

Not Practical

North of Exit 10, North Haven

Combination: waterways, flood plain, cemetery, buildings adjacent to highway

Exit 9, North Haven

Combination: waterways, flood plain, and buildings adjacent to highway

South of Exit 9, North Haven

Combination: waterways, flood plain, and buildings adjacent to highway

New Haven

Long Wharf Area, New Haven

West Haven (1 of 2)

Flood plain/wetland, raised bed/rock cuts, and buildings adjacent to highway

West Haven (2 of 2)

Flood plain/wetland, raised bed/rock cuts, and buildings adjacent to highway

Milford (1 of 3)

Flood plain/wetland, raised bed/rock cuts, and buildings adjacent to highway

Milford (2 of 3)

Flood plain/wetland, raised bed/rock cuts, and buildings adjacent to highway

Milford (3 of 3)

Flood plain/wetland, raised bed/rock cuts, and buildings adjacent to highway